Revert of Remove SIMD.js from V8.

src/compiler/types.h

Index: src/compiler/types.h
diff --git a/src/compiler/types.h b/src/compiler/types.h
index 3d53f8218cb6de33874bcf5c7d425088c9d80fb8..52d4becbc54f258b85d79381b45beb874d5f13be 100644
--- a/src/compiler/types.h
+++ b/src/compiler/types.h
@@ -116,16 +116,17 @@
   V(Symbol,              1u << 12)  \
   V(InternalizedString,  1u << 13)  \
   V(OtherString,         1u << 14)  \
-  V(OtherCallable,       1u << 15)  \
-  V(OtherObject,         1u << 16)  \
-  V(OtherUndetectable,   1u << 17)  \
-  V(CallableProxy,       1u << 18)  \
-  V(OtherProxy,          1u << 19)  \
-  V(Function,            1u << 20)  \
-  V(BoundFunction,       1u << 21)  \
-  V(Hole,                1u << 22)  \
-  V(OtherInternal,       1u << 23)  \
-  V(ExternalPointer,     1u << 24)  \
+  V(Simd,                1u << 15)  \
+  V(OtherCallable,       1u << 16)  \
+  V(OtherObject,         1u << 17)  \
+  V(OtherUndetectable,   1u << 18)  \
+  V(CallableProxy,       1u << 19)  \
+  V(OtherProxy,          1u << 20)  \
+  V(Function,            1u << 21)  \
+  V(BoundFunction,       1u << 22)  \
+  V(Hole,                1u << 23)  \
+  V(OtherInternal,       1u << 24)  \
+  V(ExternalPointer,     1u << 25)  \
   \
   V(Signed31,                     kUnsigned30 | kNegative31) \
   V(Signed32,                     kSigned31 | kOtherUnsigned31 | \
@@ -157,11 +158,12 @@
   V(Undetectable,                 kNullOrUndefined | kOtherUndetectable) \
   V(NumberOrOddball,              kNumber | kNullOrUndefined | kBoolean | \
                                   kHole) \
+  V(NumberOrSimdOrString,         kNumber | kSimd | kString) \
   V(NumberOrString,               kNumber | kString) \
   V(NumberOrUndefined,            kNumber | kUndefined) \
   V(PlainPrimitive,               kNumberOrString | kBoolean | \
                                   kNullOrUndefined) \
-  V(Primitive,                    kSymbol | kPlainPrimitive) \
+  V(Primitive,                    kSymbol | kSimd | kPlainPrimitive) \
   V(OtherUndetectableOrUndefined, kOtherUndetectable | kUndefined) \
   V(Proxy,                        kCallableProxy | kOtherProxy) \
   V(Callable,                     kFunction | kBoundFunction | \